@book{50,
	author = {Coyne, Mark S.,},
	title = {Soil microbiology : An Exploratory Approach/},
	publisher = {Delmar,},
	year = {c1999.},
	address = {Albany, N.Y. :},
	note = {includes bibliographical references and index},
	url = {http://www.loc.gov/catdir/enhancements/fy1103/98039580-b.html}
}